|Publication number||US6035611 A|
|Application number||US 09/196,969|
|Publication date||Mar 14, 2000|
|Filing date||Nov 20, 1998|
|Priority date||Nov 20, 1998|
|Also published as||CA2285864A1, CA2285864C, DE69923278D1, EP1002719A1, EP1002719B1|
|Publication number||09196969, 196969, US 6035611 A, US 6035611A, US-A-6035611, US6035611 A, US6035611A|
|Original Assignee||Automated Packaging Systems, Inc.|
|Export Citation||BiBTeX, EndNote, RefMan|
|Patent Citations (13), Referenced by (37), Classifications (14), Legal Events (4)|
|External Links: USPTO, USPTO Assignment, Espacenet|
This invention is directed to a process of making webs of interconnected bags used in packaging and more particularly to a process of making webs of bags which are opened to a rectangular configuration when passing through a loading station.
U.S. Pat. No. 5,743,070 issued Apr. 28, 1998 to Hershey Lerner and Dana J. Liebhart (herein "the SP Patent") discloses a packaging system which is enjoying significant commercial success. With the machine of the SP Patent, webs of side connected bags are used. Each web is an elongated, flattened, plastic tube which includes a top section which itself is essentially a tube. In use the top section is fed over a mandrel and past a slitter which separates the top section into two upstanding lips. The lips are grasped by unique belts that are fed along divergent paths of travel into parallel paths through a load station. The unique belts are described more fully in U.S. Pat. No. 5,722,218 issued Mar. 3, 1998 to Hershey Lerner under the title Plastic Transport System (herein "the Belt Patent"). The disclosures of the SP Patent and the Belt Patent are incorporated by reference.
Each web includes side connected bags which depend from the lips. As a web is fed along its path of travel through a machine of the SP Patent (the SP Machine), lines of weakness interconnecting sides of adjacent bags are ruptured to leave individual webs depending from the lips.
As the belts diverge, the gripped lips are separated from the depending bags along lines of weakness to the extent necessary to cause the bags to span the space between the parallel paths in a generally rectangular opening.
A problem that has manifested itself, is that the bags have not consistently opened into rectangular configurations, but rather assume other trapezoidal shapes. Moreover, the trapezoidal shapes assumed vary from web to web and indeed on occasions from bag to bag within the same web.
While the failure to open into a truly rectangular configuration can be tolerated with some products, there are other products which make the system of the SP Machine unacceptable. For example, if one is seeking to tightly package sponges each in the shape of a rectangular solid, it may be impossible to insert the products into bags other than those opened to a rectangular configuration of the precise dimension required each to receive a sponge and then produce a tight fitting bag around it.
It has been discovered that if the bag side seals extend fully to the side edges of the bags adjacent the bag tops and immediately adjacent longitudinal lines of weakness that connect the lips to the bags, consistent rectangular bag. openings are achieved.
While one cannot be certain why bags produced with such side seals assure rectangular openings, it is believed it is because the seals assure concurrent commencement of equal and opposite separation of the lips from bag faces and backs, relative to the side seals. It appears that if the side seals do not come fully to the sides of bags adjacent the longitudinal perforations, there is a tendency for either the face or the back of a bag to commence to separate from the connected lip before the other does, producing an unequal length of separation between the lips and the face and back of a given bag.
Accordingly, the object of the invention is to provide a novel and improved process of making a web of so called side pouch bags in a chain with procedures that insure bags which will open into truly rectangular configurations when fed through the machine of the SP Patent.
FIG. 1 is a perspective, somewhat schematic view based on FIG. 4 of the SP Patent, showing the web of this invention being fed through a load station;
FIG. 2 is an elevational view of the load section of the SP Machine showing the web of the present invention;
FIG. 3 is an enlarged fragmentary elevational view of a bag feed and preparation portion of the SP Machine and the web; and,
FIG. 4 is a process flow chart;
Referring to the drawings, a web 15 of side connected bags is provided. The web 15 is fed from a supply (not shown) to a bagger section 17 mounted on a support carriage 20.
The web 15 is an elongated flattened plastic tube, typically formed of polyethylene. The tube includes a top or lip section 23 for feeding along a mandrel 24. The top section 23 is connected to the tops of a chain of side connected bags 25 by front and back, longitudinally extending lines of weakness in the form of perforations 27, 28. Frangible connections 30 connect, adjacent bag side edges. Each bag 25 includes a face 31 and a back 32 interconnected at a bottom 33 by a selected one of a fold or a seal. Side seals 34 adjacent the interconnections 30 delineate the sides of the bags 25. The bag faces and backs 31, 32 are respectively connected to the top section 23 by the lines of weakness 27, 28, such that the top section 23 itself is essentially a tube.
The web 15 is fed into a bag feed and preparation portion 35 of the bagger section 17. The feed is over the mandrel 24 and past a slitter 36, FIG. 1. The slitter 36 separates the lip section 23 into opposed face and back lips. The feed through the bag feed and preparation portion 35 is caused by a pair of endless, oppositely rotating, main transport belts 40, 41 supported by oppositely rotating pulley sets.
A plow 45 is provided and shown in FIGS. 1, 2 and 3. The plow is positioned a short distance upstream from a roller cam 46. As the lips are drawn along by the main transport belts 41, 42, the lips are respectively folded over the main transport belts under the action of the plow 45.
Once the lips are folded over the tops of the main transport belts 41, 42, the roller cam 46 presses endless, lip transport and clamp belts 48, 49 into complemental grooves in the main transport belts 41, 42 respectively. Thus, the grooves function as bag clamping surfaces that are complemental with the clamping belts 48, 49 as is described more fully in the Belt Patent.
A bag side separator mechanism 53 is provided at a bag connection breaking station. The separation mechanism shown is not currently produced for machines of the SP Patent. Since it is an operative mechanism and the machine is disclosed only for environment and to explain the problem overcome by the present invention, we have not updated that aspect of the present disclosure. The separator mechanism 53 includes an endless belt 54 which is trained around a pair of spaced pulleys 55 to provide spans which, as shown in FIG. 1, are vertical. The pulleys 55 are driven by a motor 57, FIG. 2. As the belt is driven breaking pins 58 projecting from the belt 54 pass between adjacent sides of bags to break the frangible interconnections 30. Thus, as the bags depart the bag feed and preparation portion 35, they are separated from one another but remain connected to the lips 38, 39.
A load station 60 includes a pair of parallel belt spreaders 61, 62. The belt spreaders are mirror images of one another. The belt spreaders respectively include channels which respectively guide the main transport belts 40,41, on either side of the load station 60. When the transport belts 40,41, are in the channels, as is clearly seen in FIG. 1, the bags 25 are stretched between the belts in a rectangular top opening configuration.
A schematic showing of a supply funnel 66 is included in FIGS. 1 and 2. As suggested by those figures, products to be packaged are deposited through the rectangular bag openings each time a bag is registered with the supply funnel at the load station.
A space adjusting mechanism is provided. This mechanism includes a spaced pair of adjustment screws 68, 69, FIG. 2. The adjustment screw 68, 69 have oppositely threaded sections which threadably engage the belt spreaders 61, 62. Rotation of a crank 72 causes rotation of the adjustment screw 69. The screw 69 is connected to the screw 70 via belts or chains 73, which function to transmit rotation forces so that when the crank 72 is operated the screws 68, 69 are moved equally to drive the spreaders equally into an adjusted spacial, but still parallel, relationship.
As loaded bags exit the load station, it is desirable to return upper portions of the bag faces and backs into juxtaposition. To facilitate this return the bag tops are stretched. This stretching of the now loaded bags as they exit the load station is accomplished with jets of air from nozzles 75, 76 which respectively direct air streams against the lead and trailing edges of the bag being stretched. This stretching of the bags assists in moving them from their rectangular orientations into face to back juxtaposed relationships as the transport belts are returned to juxtaposition.
The improved web manufacturing process is set out in the flow chart of FIG. 4. Equipment used in the manufacture of chains of bags is well known to mechanics skilled in the art. Accordingly, the equipment itself is not shown.
In the manufacture, one starts with a flattened, heat sealable, plastic tube. Side seals 34 are formed. As is best seen in FIG. 3, the side seals 34 extend from the bag bottoms 33 to the longitudinal perforations 27,28 and fully to the sides of the bag. Indeed, to assure that the side seals extend fully to the bag sides, each seal 34 is of sufficient width to provide adjacent seals of adjacent bags.
After the side seals are formed the seals are perforated to provide the frangible connections 30 between adjacent bags. The longitudinal lines of weakness 27,28 are formed to delineate tops of the bag faces and backs 31,32 and the lip section 23. The longitudinal lines of weakness are immediately adjacent (or across small portions adjacent) the tops of the side seals.
While the sequence in forming the longitudinal lines of weakness and the lines of weakness providing the frangible bag connections is not important, it is important to form the side seals before the tube is perforated. If the perforations are formed first, the sealing operation may fuse the sides back together and unless done with extreme care the longitudinal lines of weakness are apt to be fused together or alternately the seal may end up spaced from those lines. Again, it is important that the seals extend to both of the S longitudinal lines of weakness to assure rectangular bag openings.
Although the invention has been described in its preferred form with a certain degree of particularity, it is understood that the present disclosure of the preferred form has been made only by way of example and that numerous changes in the details of construction, operation and the combination and arrangement of parts may be resorted to without departing from the spirit and the scope of the invention as hereinafter claimed.
|Cited Patent||Filing date||Publication date||Applicant||Title|
|US3283672 *||Jul 2, 1965||Nov 8, 1966||Bemis Co Inc||Bag|
|US3791573 *||Nov 15, 1971||Feb 12, 1974||Basic Packaging Sys Inc||Bag construction|
|US4655737 *||Apr 24, 1985||Apr 7, 1987||Mobil Oil Corporation||Method for preparing flat-bottom thermoplastic sack|
|US4665552 *||Jun 18, 1985||May 12, 1987||Minigrip, Inc.||Zipper equipped bags and method of and means for manually filling and separating them|
|US4945714 *||Nov 14, 1989||Aug 7, 1990||Package Machinery Company, Bodolay/Pratt Division||Form, fill, seal and separate packaging machine for reclosable containers|
|US5045040 *||Mar 28, 1990||Sep 3, 1991||Uniflex, Inc.||Envelope closure seal and method|
|US5226858 *||Feb 27, 1992||Jul 13, 1993||Equitable Bag Co., Inc.||Method and apparatus for producing bags interconnected at their open ends|
|US5470419 *||Dec 21, 1993||Nov 28, 1995||Ajinomoto Co., Inc.||Easily tearable film and pouch made therefrom|
|US5514067 *||Sep 16, 1994||May 7, 1996||The Procter & Gamble Company||Easy open feature for polymeric package with contents under high compression|
|US5519982 *||Apr 14, 1995||May 28, 1996||Kraft Foods, Inc.||Pouch having easy opening and reclosing characteristics and method and apparatus for production thereof|
|US5711751 *||Jul 5, 1995||Jan 27, 1998||Harmanoglu; Hikmet||Hermetic seal for a plastic bag|
|US5722218 *||Aug 16, 1996||Mar 3, 1998||Automated Packaging Systems, Inc.||Plastic transport system|
|US5743070 *||Aug 16, 1996||Apr 28, 1998||Automated Packaging Systems, Inc.||Packaging machine, material and method|
|Citing Patent||Filing date||Publication date||Applicant||Title|
|US6367975||May 24, 2001||Apr 9, 2002||Automated Packaging Systems, Inc.||Packaging web and process|
|US6499278||Feb 5, 2002||Dec 31, 2002||Automated Packaging Systems, Inc.||Packaging web and process|
|US6550226||Oct 27, 2000||Apr 22, 2003||Gates Automation, Inc.||Bag filling and sealing machine and method for handling bags|
|US6598373||Feb 13, 2001||Jul 29, 2003||Sealed Air Corporation (Us)||Apparatus and method for forming inflated containers|
|US6651406||Jun 20, 2001||Nov 25, 2003||Sealed Air Corporation (Us)||Apparatus and method for forming inflated containers|
|US6742321||Sep 30, 2002||Jun 1, 2004||Gates Automation, Inc.||Flange alignment and grasping assembly for bag handling apparatus|
|US6804933||Jan 17, 2003||Oct 19, 2004||Sealed Air Corporation (Us)||Apparatus and method for forming inflated containers|
|US7165375||Feb 5, 2005||Jan 23, 2007||Sealed Air Corporation (Us)||Inflation device for forming inflated containers|
|US7220476||Jan 25, 2002||May 22, 2007||Sealed Air Corporation (Us)||Apparatus and method for forming inflated chambers|
|US7225599||Apr 5, 2005||Jun 5, 2007||Sealed Air Corporation||Apparatus and method for forming inflated articles|
|US7325377 *||May 11, 2004||Feb 5, 2008||Free-Flow Packaging International, Inc.||Apparatus for making pneumatically filled packing cushions|
|US7389626||Apr 4, 2007||Jun 24, 2008||Sealed Air Corporation (Us)||Apparatus and method for forming inflated articles|
|US7429304||Jul 14, 2005||Sep 30, 2008||Sealed Air Corporation||High-speed apparatus and method for forming inflated chambers|
|US7448185 *||Apr 18, 2006||Nov 11, 2008||Automated Packaging Systems, Inc.||Method and apparatus for making packages with internal headers from preformed bags|
|US7526904||Oct 4, 2007||May 5, 2009||Free-Flow Packaging International, Inc.||Apparatus for making pneumatically filled packing cushions|
|US7721781||Sep 19, 2006||May 25, 2010||Sealed Air Corporation||Apparatus and method for forming inflated chambers|
|US8020358||Nov 2, 2004||Sep 20, 2011||Sealed Air Corporation (Us)||Apparatus and method for forming inflated containers|
|US8141329||Oct 7, 2008||Mar 27, 2012||Automated Packaging Systems, Inc.||Method and apparatus for making packages with internal headers from preformed bags|
|US8621745 *||Dec 12, 2007||Jan 7, 2014||Ccl Label Gmbh||Stretch film sleeve label applicator|
|US8627637||Sep 13, 2004||Jan 14, 2014||Pregis Innovative Packaging, Inc.||Method and machine for the manufacture of air pillows|
|US8776483||Mar 25, 2009||Jul 15, 2014||Free-Flow Packaging International, Inc.||System for making pneumatically filled packing cushions|
|US8904740||Aug 9, 2013||Dec 9, 2014||Intertape Polymer Corp.||Method and apparatus for changing a strip of sealed bag precursors in to open bags|
|US9139317||Oct 31, 2014||Sep 22, 2015||Intertape Polymer Corp.||Method and apparatus for opening bags while maintaining a continuous strip of bag precursors|
|US20030106282 *||Jan 17, 2003||Jun 12, 2003||Sperry Charles R.||Apparatus and method for forming inflated containers|
|US20040206050 *||May 11, 2004||Oct 21, 2004||Free-Flow Packaging International, Inc.||System, method and material for making pneumatically filled packing cushions|
|US20050204700 *||Sep 13, 2004||Sep 22, 2005||Greenwood John S||Method and machine for the manufacture of air pillows|
|US20060090421 *||Nov 2, 2004||May 4, 2006||Sealed Air Corporation (Us).||Apparatus and method for forming inflated containers|
|US20060174589 *||Feb 5, 2005||Aug 10, 2006||O'dowd Robert J||Inflation device for forming inflated containers|
|US20060218879 *||Mar 31, 2005||Oct 5, 2006||Sealed Air Corporation (Us)||Apparatus for forming inflated packaging cushions|
|US20060218880 *||Apr 5, 2005||Oct 5, 2006||Sealed Air Corporation (Us)||Apparatus and method for forming inflated articles|
|US20060289108 *||Jul 14, 2005||Dec 28, 2006||Sealed Air Corporation (Us)||High-speed apparatus and method for forming inflated chambers|
|US20070240386 *||Apr 18, 2006||Oct 18, 2007||Zeedyk Derek J||Method and apparatus for making packages with internal headers from preformed bags|
|US20090031675 *||Oct 7, 2008||Feb 5, 2009||Automated Packaging Systems, Inc.||Method and apparatus for making packages with internal headers from preformed bags|
|US20100163164 *||Dec 12, 2007||Jul 1, 2010||Ccl Label Gmbh||Stretch film sleeve label applicator|
|EP1260443A1||May 20, 2002||Nov 27, 2002||Automated Packaging Systems, Inc.||Packaging web and process of packaging utilizing such web|
|WO2014066755A1 *||Oct 25, 2013||May 1, 2014||Automated Packaging Systems, Inc||Expandable bags and methods of forming and using same|
|WO2015050423A1 *||Oct 3, 2013||Apr 9, 2015||Grijalva Varillas Sergio Fernando||Packaging for preserving fruits and vegetables, and manufacturing method|
|U.S. Classification||53/455, 53/384.1|
|International Classification||B65B61/02, B65B43/04, B31B23/00|
|Cooperative Classification||B65B43/04, B31B2237/40, B31B23/00, B31B2237/10, B65B61/02, B31B2237/406|
|European Classification||B31B23/00, B65B43/04, B65B61/02|
|Nov 20, 1998||AS||Assignment|
Owner name: AUTOMATED PACKAGING SYSTEMS, INC., OHIO
Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:LERNER, HERSHEY;REEL/FRAME:009610/0333
Effective date: 19981117
|Sep 9, 2003||FPAY||Fee payment|
Year of fee payment: 4
|Sep 14, 2007||FPAY||Fee payment|
Year of fee payment: 8
|Sep 14, 2011||FPAY||Fee payment|
Year of fee payment: 12